The invention discloses a blind flange misalignment butt-joint device. The blind flange misalignment butt-joint device comprises a first blind flange arranged at the end of a subsea pipe, a second blind flange arranged at the end of a pile leg, a transition plate, a plurality of buckling plates and fixing bolts; the first blind flange is provided with a plurality of bolt holes; the edge of the side, attached to the first blind flange, of the transition plate is inwards provided with a plurality of sunken grooves in the radial direction; each buckling plate is composed of a left buckling edge,a right buckling edge and a connecting edge for connecting the end of the left buckling edge with the end of the right buckling edge; the left buckling edges are longer than the right buckling edges;the left buckling edge of each buckling plate is slidably arranged in the corresponding sunken groove; the right buckling edges buckle the side, close to the pile leg, of the second blind flange; theleft buckling edge of each buckling plate is provided with a long through hole in the length direction; and the fixing bolts penetrate through the bolt holes and the long through holes, and when the fixing bolts are fastened, the buckling plate is pulled towards the first blind flange by the fixing bolts. The blind flange misalignment butt-joint device has the advantages that assembling and disassembling are convenient, a pipeline is free of stress after the device is installed, and safety and reliability are achieved.